How to address the large temperature drop in the pressure-reduced oil transfer line?
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Our pressure-reduction oil transfer line experiences a temperature drop of 15°C; I wonder what the temperature drop levels are for everyone else? How to address large temperature drops?
Personal opinions are not necessarily comprehensive; the temperature drop should be caused by two factors: 1. Insulation performance； 2. Caused by the endothermic process of partial vaporization of the liquid phase at low speeds ； The first case is to enhance the insulation effect, and the second is a requirement of the manufacturing process.
The pressure-reducing transfer line at the outlet of the vacuum furnace serves as a flashing zone in the vaporization section of the vacuum tower, compensating for the limited space in that section. The greater the temperature difference, the better the effect of premature vaporization; we are also at this level
There is also the error in the temperature measurement points; the temperature measured above the oil transfer line is the temperature of the oil and gas!
Reservations are held regarding the claim for the 3rd floor: reducing pressure drop naturally leads to a reduction in temperature drop. With a constant gasification rate in the feed section of the pressure reduction tower, this approach effectively lowers the load on the furnace and prevents cracking of the oil products